What are 3 things that remove nitrogen directly from the atmosphere?

Three processes that remove nitrogen directly from the atmosphere include nitrogen fixation, where certain bacteria and legumes convert atmospheric nitrogen (N₂) into ammonia (NH₃); lightning, which causes nitrogen gas to react with oxygen, forming nitrogen oxides that can eventually be deposited in the soil; and industrial processes, such as the Haber-Bosch process, which synthesizes ammonia from atmospheric nitrogen for fertilizers. These processes play crucial roles in the nitrogen cycle, making nitrogen available for biological use.